class_docstr: Test Layers.
  
  The tests in this class only do basic sanity checks to make sure that
  produced tensors have the right shape.
code: def setUp(self):
      super(TestLayers, self).setUp()
      self.root = "/tmp"
  
file_path: deepchem/contrib/nn/tests/test_layers.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import unicode_literals
  import numpy
  import unittest
  import deepchem
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 1 for calling the TestLayers obj's underlying member method code with example usage: obj.setUp() without return types